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A letter or a prediction that opens itself on the day.
Write a letter or make a prediction, pick the day it opens, and send the link in any chat. Until that day, nobody can read it: not the people you send it to, not you, not us.
Three steps
- 1
Write your letter on your phone or computer. Add a few photos if you like.
- 2
Pick the day it opens, up to 366 days ahead.
- 3
Send it as a message in any chat, or as a file. On the day, it opens.
What people use it for
A birthday letter
Write it today, and it opens on the morning of the day.
A wedding letter
Words for the couple to open on their first anniversary.
A class capsule
Each pupil writes to their future self, opened on the last day of the year.
A prediction
Call it now, and you can't take it back. It opens itself on the day for everyone with the link, right or wrong.
Make a prediction
What it does
Nobody can open the capsule before its date, not you, not the person you send it to and not us, and on the day anyone with the link or file can.
What it doesn’t do
- It does not keep a copy for you. If you lose the link or the file, nobody can open it, us included.
- It depends on a public time signal run by a group of independent organisations. If they stop running it before the date, the capsule may never open.
- It does not stop the person who wrote the letter telling anyone what it says.
Your letter is locked on your phone or computer before anything is sent. We never see it, and we never ask who you are.
Curious how the lock works, or want to open a capsule without this site? How it works.